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Edit File : rcode.py \| Size : 4.06 KB
# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license # Copyright (C) 2001-2017 Nominum, Inc. # # Permission to use, copy, modify, and distribute this software and its # documentation for any purpose with or without fee is hereby granted, # provided that the above copyright notice and this permission notice # appear in all copies. # # THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT # OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. """DNS Result Codes.""" from typing import Tuple import dns.enum import dns.exception class Rcode(dns.enum.IntEnum): #: No error NOERROR = 0 #: Format error FORMERR = 1 #: Server failure SERVFAIL = 2 #: Name does not exist ("Name Error" in RFC 1025 terminology). NXDOMAIN = 3 #: Not implemented NOTIMP = 4 #: Refused REFUSED = 5 #: Name exists. YXDOMAIN = 6 #: RRset exists. YXRRSET = 7 #: RRset does not exist. NXRRSET = 8 #: Not authoritative. NOTAUTH = 9 #: Name not in zone. NOTZONE = 10 #: DSO-TYPE Not Implemented DSOTYPENI = 11 #: Bad EDNS version. BADVERS = 16 #: TSIG Signature Failure BADSIG = 16 #: Key not recognized. BADKEY = 17 #: Signature out of time window. BADTIME = 18 #: Bad TKEY Mode. BADMODE = 19 #: Duplicate key name. BADNAME = 20 #: Algorithm not supported. BADALG = 21 #: Bad Truncation BADTRUNC = 22 #: Bad/missing Server Cookie BADCOOKIE = 23 @classmethod def _maximum(cls): return 4095 @classmethod def _unknown_exception_class(cls): return UnknownRcode class UnknownRcode(dns.exception.DNSException): """A DNS rcode is unknown.""" def from_text(text: str) -> Rcode: """Convert text into an rcode. text, a ``str``, the textual rcode or an integer in textual form. Raises ``dns.rcode.UnknownRcode`` if the rcode mnemonic is unknown. Returns a ``dns.rcode.Rcode``. """ return Rcode.from_text(text) def from_flags(flags: int, ednsflags: int) -> Rcode: """Return the rcode value encoded by flags and ednsflags. flags, an ``int``, the DNS flags field. ednsflags, an ``int``, the EDNS flags field. Raises ``ValueError`` if rcode is < 0 or > 4095 Returns a ``dns.rcode.Rcode``. """ value = (flags & 0x000F) \| ((ednsflags >> 20) & 0xFF0) return Rcode.make(value) def to_flags(value: Rcode) -> Tuple[int, int]: """Return a (flags, ednsflags) tuple which encodes the rcode. value, a ``dns.rcode.Rcode``, the rcode. Raises ``ValueError`` if rcode is < 0 or > 4095. Returns an ``(int, int)`` tuple. """ if value < 0 or value > 4095: raise ValueError("rcode must be >= 0 and <= 4095") v = value & 0xF ev = (value & 0xFF0) << 20 return (v, ev) def to_text(value: Rcode, tsig: bool = False) -> str: """Convert rcode into text. value, a ``dns.rcode.Rcode``, the rcode. Raises ``ValueError`` if rcode is < 0 or > 4095. Returns a ``str``. """ if tsig and value == Rcode.BADVERS: return "BADSIG" return Rcode.to_text(value) ### BEGIN generated Rcode constants NOERROR = Rcode.NOERROR FORMERR = Rcode.FORMERR SERVFAIL = Rcode.SERVFAIL NXDOMAIN = Rcode.NXDOMAIN NOTIMP = Rcode.NOTIMP REFUSED = Rcode.REFUSED YXDOMAIN = Rcode.YXDOMAIN YXRRSET = Rcode.YXRRSET NXRRSET = Rcode.NXRRSET NOTAUTH = Rcode.NOTAUTH NOTZONE = Rcode.NOTZONE DSOTYPENI = Rcode.DSOTYPENI BADVERS = Rcode.BADVERS BADSIG = Rcode.BADSIG BADKEY = Rcode.BADKEY BADTIME = Rcode.BADTIME BADMODE = Rcode.BADMODE BADNAME = Rcode.BADNAME BADALG = Rcode.BADALG BADTRUNC = Rcode.BADTRUNC BADCOOKIE = Rcode.BADCOOKIE ### END generated Rcode constants Back

Edit File : rcode.py | Size : 4.06 KB

# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license

# Copyright (C) 2001-2017 Nominum, Inc.
#
# Permission to use, copy, modify, and distribute this software and its
# documentation for any purpose with or without fee is hereby granted,
# provided that the above copyright notice and this permission notice
# appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

"""DNS Result Codes."""

from typing import Tuple

import dns.enum
import dns.exception

class Rcode(dns.enum.IntEnum):
    #: No error
    NOERROR = 0
    #: Format error
    FORMERR = 1
    #: Server failure
    SERVFAIL = 2
    #: Name does not exist ("Name Error" in RFC 1025 terminology).
    NXDOMAIN = 3
    #: Not implemented
    NOTIMP = 4
    #: Refused
    REFUSED = 5
    #: Name exists.
    YXDOMAIN = 6
    #: RRset exists.
    YXRRSET = 7
    #: RRset does not exist.
    NXRRSET = 8
    #: Not authoritative.
    NOTAUTH = 9
    #: Name not in zone.
    NOTZONE = 10
    #: DSO-TYPE Not Implemented
    DSOTYPENI = 11
    #: Bad EDNS version.
    BADVERS = 16
    #: TSIG Signature Failure
    BADSIG = 16
    #: Key not recognized.
    BADKEY = 17
    #: Signature out of time window.
    BADTIME = 18
    #: Bad TKEY Mode.
    BADMODE = 19
    #: Duplicate key name.
    BADNAME = 20
    #: Algorithm not supported.
    BADALG = 21
    #: Bad Truncation
    BADTRUNC = 22
    #: Bad/missing Server Cookie
    BADCOOKIE = 23

@classmethod
    def _maximum(cls):
        return 4095

@classmethod
    def _unknown_exception_class(cls):
        return UnknownRcode

class UnknownRcode(dns.exception.DNSException):
    """A DNS rcode is unknown."""

def from_text(text: str) -> Rcode:
    """Convert text into an rcode.

*text*, a ``str``, the textual rcode or an integer in textual form.

Raises ``dns.rcode.UnknownRcode`` if the rcode mnemonic is unknown.

Returns a ``dns.rcode.Rcode``.
    """

return Rcode.from_text(text)

def from_flags(flags: int, ednsflags: int) -> Rcode:
    """Return the rcode value encoded by flags and ednsflags.

*flags*, an ``int``, the DNS flags field.

*ednsflags*, an ``int``, the EDNS flags field.

Raises ``ValueError`` if rcode is < 0 or > 4095

Returns a ``dns.rcode.Rcode``.
    """

value = (flags & 0x000F) | ((ednsflags >> 20) & 0xFF0)
    return Rcode.make(value)

def to_flags(value: Rcode) -> Tuple[int, int]:
    """Return a (flags, ednsflags) tuple which encodes the rcode.

*value*, a ``dns.rcode.Rcode``, the rcode.

Raises ``ValueError`` if rcode is < 0 or > 4095.

Returns an ``(int, int)`` tuple.
    """

if value < 0 or value > 4095:
        raise ValueError("rcode must be >= 0 and <= 4095")
    v = value & 0xF
    ev = (value & 0xFF0) << 20
    return (v, ev)

def to_text(value: Rcode, tsig: bool = False) -> str:
    """Convert rcode into text.

*value*, a ``dns.rcode.Rcode``, the rcode.

Raises ``ValueError`` if rcode is < 0 or > 4095.

Returns a ``str``.
    """

if tsig and value == Rcode.BADVERS:
        return "BADSIG"
    return Rcode.to_text(value)

### BEGIN generated Rcode constants

NOERROR = Rcode.NOERROR
FORMERR = Rcode.FORMERR
SERVFAIL = Rcode.SERVFAIL
NXDOMAIN = Rcode.NXDOMAIN
NOTIMP = Rcode.NOTIMP
REFUSED = Rcode.REFUSED
YXDOMAIN = Rcode.YXDOMAIN
YXRRSET = Rcode.YXRRSET
NXRRSET = Rcode.NXRRSET
NOTAUTH = Rcode.NOTAUTH
NOTZONE = Rcode.NOTZONE
DSOTYPENI = Rcode.DSOTYPENI
BADVERS = Rcode.BADVERS
BADSIG = Rcode.BADSIG
BADKEY = Rcode.BADKEY
BADTIME = Rcode.BADTIME
BADMODE = Rcode.BADMODE
BADNAME = Rcode.BADNAME
BADALG = Rcode.BADALG
BADTRUNC = Rcode.BADTRUNC
BADCOOKIE = Rcode.BADCOOKIE

### END generated Rcode constants

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